"... Modelling sediment transport in environmental turbulent fluids is a challenge. This article develops a sound model of the lateral transport of suspended sediment in environmental fluid flows such as floods and tsunamis. The model is systematically derived from a 3D turbulence model based on the Smag ..."

Modelling sediment transport in environmental turbulentfluids is a challenge. This article develops a sound model of the lateral transport of suspended sediment in environmental fluid flows such as floods and tsunamis. The model is systematically derived from a 3D turbulence model based

"... Several methods have been previously used to approximate free boundaries in tinitedifference numerical simulations. A simple, but powerful, method is described that is based on the concept of a fractional volume of fluid (VOF). This method is shown to be more flexible and efftcient than other method ..."

Several methods have been previously used to approximate free boundaries in tinitedifference numerical simulations. A simple, but powerful, method is described that is based on the concept of a fractional volume of fluid (VOF). This method is shown to be more flexible and efftcient than other

"... This paper formulates a model of mixing in a stratified and turbulent fluid. The model uses the horizontally averaged vertical buoyancy gradient and the density of turbulent kinetic energy as variables. Heuristic ‘mixing-length ’ arguments lead to a coupled set of parabolic differential equations. A ..."

This paper formulates a model of mixing in a stratified and turbulentfluid. The model uses the horizontally averaged vertical buoyancy gradient and the density of turbulent kinetic energy as variables. Heuristic ‘mixing-length ’ arguments lead to a coupled set of parabolic differential equations

"... The turbulent fluid flow through the sudden expansion passage is of scientific and industrial significance. The numerical analysis of the turbulent fluid flow through an axi-symmetric sudden expansion passage has been carried out by using modified �� � model, taking into consideration the effects of ..."

The turbulentfluid flow through the sudden expansion passage is of scientific and industrial significance. The numerical analysis of the turbulentfluid flow through an axi-symmetric sudden expansion passage has been carried out by using modified �� � model, taking into consideration the effects

"... Most of a signal information is often found in irregular structures and transient phenomena. We review the mathematical characterization of singularities with Lipschitz exponents. The main theorems that estimate local Lipschitz exponents of functions, from the evolution across scales of their wavele ..."

Most of a signal information is often found in irregular structures and transient phenomena. We review the mathematical characterization of singularities with Lipschitz exponents. The main theorems that estimate local Lipschitz exponents of functions, from the evolution across scales of their wavelet transform are explained. We then prove that the local maxima of a wavelet transform detect the location of irregular structures and provide numerical procedures to compute their Lipschitz exponents. The wavelet transform of singularities with fast oscillations have a different behavior that we study separately. We show that the size of the oscillations can be measured from the wavelet transform local maxima. It has been shown that one and two-dimensional signals can be reconstructed from the local maxima of their wavelet transform [14]. As an application, we develop an algorithm that removes white noises by discriminating the noise and the signal singularities through an analysis of their ...

"... xx/xx/2012 Comparisons of the integrated thermal pressure support of gas against its gravitational potential energy lead to critical mass scales for gravitational instability such as the Jeans and the Bonnor-Ebert masses, which play an important role in analysis of many physical systems, including t ..."

the heuristics of numerical simulations. In a strict theoret-ical sense, however, neither the Jeans nor the Bonnor-Ebert mass are meaningful when applied locally to substructure in a self-gravitating turbulent medium. For this reason, we investigate the local support by thermal pressure, turbulence, and magnetic

"... Abstract:- We develop a methodology for the synthetic computational multiscale modeling of turbulent interfaces by successive geometrical deformations. Modeling of such interfaces is useful in engineering applications and scientific phenomena where physical processes occur on or across fluid interfa ..."

Abstract:- We develop a methodology for the synthetic computational multiscale modeling of turbulent interfaces by successive geometrical deformations. Modeling of such interfaces is useful in engineering applications and scientific phenomena where physical processes occur on or across fluid